Method of making hot-water bottles



April 19, 1927. 3,625,3@6

W. E. ROBERTS METHOD 0F MAKING HOT WATER BOTTLES Filed Dec. s, 1924 2 sheets-sheet 1 @icm ff@ i2 f3 I 3,625,396 Apm 19? 3927o W. E. ROBERTS METHOD OF MAKING HOT WATER BOTTLES Filed Deo. a, 1924 2 Sheets-Sheet 2.

Patented Apr. is; lezr.-

n ROBERTS, or YoNKEns, New wenn, Assiette R T0 PAOUNT RUBBER GONSOLIDATED, ING., 0F TUQKHOE, NEW YORK, A CORPORATION 0F METHOD 0F u" 1I' me normanna-normas.

' application met December s, wat. serial No. 75eme.

in use frequently loosens the cement, which results in an inedective junction of the cooperating parts. y

One of the objects of my invention, therel@ Jloro, is the revision of means for enabling an e'ective junction to be made between the ferrule and the neck of a hot water bottle.. so as to obviate the necessity for the use of cement or other material applied after vul- 2@ canization, and to edectively resist the tendency of the rotated plug to twist the ferrule tree from the neck.

.Al-further object of my invention is the provision of means for enabling a hot water 2li bottle to be satisfactorily suspended from -avertical surface without necessitating the use of fastening` members, which are attached to the supporting surface. To this end, ll contemplate the use of a sucker which is carau ried by the bottle and is adapted lto engage the vertical surface and to adhere thereto,-

whenever the air is excludedglrom the face of the sucker and the supportingI surface.; lin this connection,my invention is directed 35 towards the provision of means whereby the sucker may be formed in a simple manner, and homogeneously united with the rubber either durlng the forming or vulcanizing operation,l

The invention is illustrated in the drawings wherein Fig. 1 is a plan view of the bottom section of a forming moldemployed for.

carrying out my invention; Fig. 2 is a perspective viewof a threaded errule with a sleeve of rubber attached thereto; Fig. 3is

a vertical section taken through the forming mold and illustrating sheets of rubber seated therein; Fig. 4 is a detailed view lillustrating part of a hot water bottle having the neck portion in section; Fig. "5 is a section-taken on the line 5-5 in Fig. 4;:Fig. 6 is a plan view showing the bottom section of Va vulcanizing mold; Fig. 7 Ais a vertical section preferred means for carrying out my taken through a portion ot the bottom mold indicated in Fig. 6, and showing the manner in which a supporting pad may be formed; Fig. 8 is a section similar to that shown in Fig. 7 and showing the forming ring in position; Fig. 9 is a vertical section showing parts of the assembled vulcanizing mold with the hollow rubber article placed therein; Fig. 10 is a perspective view showing a part of the linished article;l and Fig. 1l `is a perspective view of the mandrel ,shown in Fig. 9.

ll have illustrated mywinvention in connection with. the manufacture of a *hot water bottle. The molds for forming the article are illustrated as comprising a lower mold section 10 and an upper mold section 11' which have cooperatingv recesses in which the hollow rubber article is formed."l Sec'-,

tion 1D is shown as being provided with passageways 12 which ylead to a common passageway 13, while theupper section is illustrated as having spaced passageways 14e which lead to a common passageway 15. Connections are shown nat 16 and 17 respectively for enabling a vacuum to be produced in the respective passageways 13 and 15. The vacuum withm the passageways is employedfor seating'sheets of rubber stock within the respective mold sections.' `.The article thus formed is made from a lower sheet A and an upper sheet B which are united at the marginal edges when the respective sections are brought together.- Bei ore the sections are broughttogether, however, a' mandrel v2,0 having a errule 21 threaded thereto is laced-within the rubber lined lower molpdl section adjacent the neck of the bottle. Y l F To insure an effective connection between the ferrule 21 and the rubber comprising the body portion of the bottle l may cover the outer surface of the ferrule with raw rubber and then mold it to the shape shown in Fig, 2 and subsequently semi-cure it so as to make it adhere to the ferrule and preserve its shape. In the embodiment shown` in Fig. 2, the coating indicated at 23 has ears 24 which project laterally therefrom, and on diametrically oppositepsides oi the ferrule. The coating terminates adjacent the ends of the ferrule, whereb the ferrule may, 25 ofthe man,

be threaded onto the sha lill lli

tim

ders ot hot `vater bottles. Accordingly,

when the co-operating mold sections having sheet rubber stock inserted therein are brought together, the ears are compressed by the rubber adjacent the seam, and thereby are iirinly embedded in such manner as to prevent rotation oi' the feri'ule with reference to the neck ot the bottle. rlhe edect oi such action is illustrated in l4`ig. 5, Wherein the seam torming portion ot the rubber surrounds the ears so that when the article is vulcanized the coating 23 becomes united with the rubber iloiming the body of the article.

ln making the neel( ot the bottle, l have shown the lower mold section being so termed that a tab 30 is termed as an entension ot the bottle tunnel. 'lhe tab tunetions to support a button or sucker 3l which is so shaped that the bottle may be suspended upon a vertical Wall or other sup portino surface Whenever the button is pressed against the Wall With suiiicient pressure to exclude the air between the button and the supporting surface.

il. simple Way ci' forming the button and attaching it to the tab is illustrated in Figs. 6 to 9, wherein the lower mold section l()ml has a cavity el() at the bottom oi which a, protuberance tl is formed. A mass of rubber C is placed within the cavity as shown in Fig. 'l' whereupon a forming member, preferably a split ring 42 is inserted into the cavity, and over the rubber C and pressed downwardly until the rubber is forced Istlightly out of the ring opening as shown in lig. 8.

The mold sections having the cavity 40 and the protuberance il therein, may comprise either the 'forming or vulcanizin mold. ln either case the rubber C whic' extends through the opening Within the ring is pressed against the rubber forming the tab which is backed by an extension 27 of the mandrel when the mold sections are brought together. Then when the article is vulcanized the button is united to tab While the errule coating is completely cured during the same operation.

An important advantage of a hot water bottle made in accordance with my invention is the fact l hat the metal ferrule which receives the stopper may be securely fastened to the neck of the bottle without necessitating the use of rubber cement applied after vulcanization or similar'fastening expedients. A further advantage is the fact that the section supportin tab may be united with the rubber whic forms part of the bottle in a very simple and expeditious manner.

, a mass of rubber within a mold cavity, ing a ring over the rubber so as to 0 Having thus described my invent-ion, l claim:

i. A method of making a hot water bottle comprising the seating of sheets of rubber Within cooperating mold sections, bringing the sheets together upon an interposed ferrule having lateral projections associated therewith, and exerting pressure on the sheets to join them and clamp the projections witliin the seams.

2. The method of makin hot Water botties comprising iorming tilie body of the article with a iiecli: portion and an upward extension, causing the rear side of the upward extension to adhere to a rubber button portion, and vulcanizing the body and button as a unit with the button having a concave rear face.

3. The method of making hot Water bottles comprising seating by suction two sheets ot rubber in main cavities for the body of the article bringing such rubber lined cavities together upon an interposed mandrel, carrying the ferrule portion, causing the main portion oi the bottle to engage rubber contained in an undercut cavity in a mold member, and vulcanizing the parts together.

ll. The method of makin hot water bottles comprising surrounding a metal threaded ferrulewith rubber formed with a pro'ecting portion, semi-carin such coated terru e, seating rubber for the ody and the neck of the bottle in a pair of cavitary molds mounting the coated ferrule on a mandre and placing it Within one of the rubber lined cavities and bringing the two members together, said mold members having raised cutting edges adapted to press the two sheets of rubber together to form a seam, the projection on the coated ferruIe lying between the side sheets of the body.

5. The method of making hot water bottles comprising surrounding a metal threaded terrule with rubber formed with diametric dprojecting portions, semi-curing such coate ferrule, seating by suction two rubber sheets for `the bod and the neck of the bottles in a pair o cavitary molds mounting he' coated errule on va man and placing it within one of the rubber lined cavities and bringing the two rubber lined mold members together to form a seam, the proections on the coated ferrule 1 'nowith- 1n t e seams at the shoulders of t e dy.

6. The method of forming a suction tab on a rubber article comprising theseating of rubber within a mold cavity, and bring ing the article into contact with rubber which protrudes through a removable 4hollow member, and vulcanizing the parts of the article tovether. I'

7. The meod of forming a suction tab for a rubber article comprising the seatling p acrm it to the desired shape, bringing the article into contact with part of said rubber, vulcanizing the article with the ring in pla-ce, and then removing the ring after the vulcanizing operation.

8. The method of making a hot water bottle havin asucker attached thereto, comprising 51e taking of a mold ksection having a recess therein, and also` having a cavity extending below the recess, placing a mass of raw rubber within the cavity, positioning a. hollow member also within the cavity in such manner as to force part of the rubber through the member, bringing'- a portion of the article to which the tab is to be attached into contact with that portion which extends through said member, exerting pressure upon the article so as to cause adherence between the portions of rubber which are in contact with each other, and

then uniting the rubber during the vulcanizing operation.

9. The method of forming a sucker for hot water bottles, comprising the placing of a mass of raw rubber within a hollow cavity, shaping the rubber into the desired form by the insertion of a split ring, exertingr pressure upon the ring until the rubber is forced outwardly through the center of the ring, whereby part of the rubber protrudes beyond the outer surface of the ring, then bringing a portion of the hot water bottle into contact with the rubber which protrudes lfrom -the ring and subsequent] uniting the rubber to the bottle during t e vu canizing operation.

In testimony whereof, I hereunto ailix my signature.

WILLIAM E. ROBERTS. 

